build quality: pro750 wins easily, very solid, and I never seen headphones that can double as a contortionist....cool!! While the 10 has premium leather, it's very flimsy, especially the headband slider thingy, have to be gentle with these.

looks: ED10 wins this round, very dark brown leather (almost black) gives it sophisticated look, as a matter of fact it's a lot different than the reddish brown/earth colour of the online images that you see of the ED10. Not sure if the leather darkening is due to the first owner's usage or it's like that from the factory (gonna pm him). The pro750 only winning point is the royal blue colour (I like blue). Earpads are really ugly. Those white earpads look extremely dirty (not dirty, just look like it). I much prefer the look of the current 750 (black earpads/grey frame) vs old 750 (blue/white).

quick sonic impression: pro750 has way more bass than ED10. But treble is where the ED10 outshines (literally) the pro750. Listen to stringed instruments, it's delicate and airy. A details lover's dream!!